Abstract:The DOE-HOE's, made by Dot-matrix technology, have found application in various areas, such as security, protection of various goods from faking, packing etc. These holograms contain a set of pixels with diffraction gratings with different spatial frequencies and orientation. The process of manufacturing represents a consecutive pixels exposure. The pixels quantity is great (about 1O51O6), that's why master-shim manufacturing requires considerable time. Spatial frequency and orientation of gratings change beca… Show more
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